12320145647 has 2 divisors, whose sum is σ = 12320145648. Its totient is φ = 12320145646.

The previous prime is 12320145641. The next prime is 12320145671. The reversal of 12320145647 is 74654102321.

It is a weak prime.

It is an emirp because it is prime and its reverse (74654102321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12320145647 - 2¹⁰ = 12320144623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12320145641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160072823 + 6160072824.

It is an arithmetic number, because the mean of its divisors is an integer number (6160072824).

Almost surely, 2^12320145647 is an apocalyptic number.

12320145647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320145647 is an equidigital number, since it uses as much as digits as its factorization.

12320145647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 12320145647 its reverse (74654102321), we get a palindrome (86974247968).

The spelling of 12320145647 in words is "twelve billion, three hundred twenty million, one hundred forty-five thousand, six hundred forty-seven".